CN209212492U - A kind of adjustable gas attenuating device of frequency - Google Patents

Abstract

The utility model relates to fluid machinery noise reduction technology fields, disclose a kind of adjustable gas attenuating device of frequency, including shell, guide pipe, sealing plate, piston and connecting rod；One end of shell connects guide pipe, shell connects sealing plate far from one end of guide pipe, bulge loop is provided on sealing plate, connecting rod is threadedly coupled with bulge loop, connecting rod is connect far from one end of bulge loop with piston, piston is embedded in guide pipe, and piston and guide pipe are axial in the presence of the gap that fluid can be allowed to pass through, and cavity is collectively formed in shell, guide pipe, sealing plate, connecting rod and piston；Sealing ring is additionally provided between connecting rod and bulge loop.The utility model is simple with structure, easy for installation and effect of vibration and noise reduction is good；Piston motion is driven by the extraneous driving device drive link such as stepper motor or spanner, the piston made is embedded in the depth of guide pipe in guiding in-pipe, and then regulating piston, and gas attenuating device frequency is adjustable to obtain purpose to reach.

Description

A kind of adjustable gas attenuating device of frequency

Technical field

The utility model relates to fluid machinery noise reduction technology fields, and in particular to a kind of adjustable gas of frequency Attenuating device.

Background technique

Fluid machinery is as the common apparatus for changing gas pressure and conveying gas, such as compressor, expanding machine and vapour Turbine etc. is widely applied in fields such as petroleum, natural gas, chemical industry, metallurgy.These fluid machineries have certain period Property, periodic gas excitation, and then induced vibration, radiated noise can be generated during the work time, or even are influenced whether The Performance And Reliability of machine.In addition, these fluid machineries are in practical applications, the gas driving frequency of fluid machinery is simultaneously It is not fixed and invariable, but changes (such as variation of running speed) as operating condition changes, therefore gas declines The frequency of fadings for subtracting device needs to be Frequency Adjustable, changes with the change of gas driving frequency.

Helmholtz gas attenuator is a kind of common gas attenuating device, at present to Helmholtz air-flow The theoretical research of pulsation dampening and practical application have reached very high level, but they have a common feature, and structure is solid Fixed, frequency of noise elimination range is constant.It, can only be by parallel or series when the frequency range of gas driving source is larger Mode expands frequency of noise elimination range, causes bulky, and the pressure loss is high, brings inconvenience to practical application.

Utility model content

The utility model solve the technical issues of be to provide it is a kind of according to gas driving frequency adjust gas decline Subtract the gas attenuator of frequency.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of adjustable gas of frequency declines Subtract device, including shell, guide pipe, sealing plate, piston and connecting rod；One end of the shell connects guide pipe, and the shell is remote One end from guide pipe connects sealing plate, is provided with bulge loop on the sealing plate, the connecting rod is threadedly coupled with bulge loop, the company Bar is connect far from one end of bulge loop with piston, and the piston is embedded in guide pipe, and the piston axially exists with guide pipe can With the gap for allowing fluid to pass through, cavity is collectively formed in the shell, guide pipe, sealing plate, connecting rod and piston.

Further, the connecting rod, under the action of the external mechanicals driving device such as stepper motor or spanner, driving connects Bar drives piston motion, and the piston allow is mobile in guiding inner axial tube；It is embedded in the position in guide pipe by regulating piston, Change the resonant frequency of gas attenuating device.

Further, being additionally provided with sealing ring between the connecting rod and bulge loop.

Further, the connecting rod is threadedly coupled with the connection type of piston or integral structure.

Further, the guide pipe is to be threadedly coupled or weld with the connection type of shell.

Further, the sealing plate is to be threadedly coupled or weld with the connection type of shell.

The beneficial effects of the utility model are: the utility model has, structure is simple, easy for installation and effect of vibration and noise reduction It is good；Piston motion is driven by the extraneous driving device drive link such as stepper motor or spanner, the piston made moves in guide pipe It is dynamic, and then the depth of regulating piston insertion guide pipe, to reach the adjustable purpose of gas attenuating device frequency.

Detailed description of the invention

Fig. 1 is the gas attenuating device structure schematic diagram of embodiment one；

Fig. 2 is the gas attenuating device structure schematic diagram of embodiment two.

In the figure, it is marked as 11, shell；12, guide pipe；13, sealing plate；131, bulge loop；14, connecting rod；15, piston；151, Circular cone ring；16, sealing ring.

Specific embodiment

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Fluid machinery during the work time, can generate a kind of periodic pressure oscillation, also known as gas.Gas Fluid machinery is reacted on as a kind of excitation, vibration is generated, induces noise.In practical applications, the gas of these fluid machineries Stream impulse excitation frequency is not fixed and invariable, but change with operating condition change (such as the change of running speed Change), therefore the frequency of fadings of gas attenuating device needs to be Frequency Adjustable, with the change of gas driving frequency Variation increases the difficulty of decaying gas.The utility model is based on Helmholz resonance chamber principle, provides a kind of basis The gas attenuating device of gas frequency of fadings can be adjusted in gas driving frequency, mechanical for dampening fluid Gas amplitude, inhibit gas caused by vibrational excitation and reduce gas induce aerodynamic noise.

Embodiment one

As shown in Figure 1, a kind of adjustable gas attenuating device of frequency, including shell 11, guide pipe 12, Sealing plate 13, piston 15 and connecting rod 14；One end of the shell 11 connects guide pipe 12, the company of the guide pipe 12 and shell 11 Mode is connect to be threadedly coupled or welding；The shell 11 connects sealing plate 13, the sealing plate 13 far from one end of guide pipe 12 It is to be threadedly coupled or weld with the connection type of shell 11；Be provided with bulge loop 131 on the sealing plate 13, the connecting rod 14 with it is convex Ring 131 is threadedly coupled, and the one end of the connecting rod 14 far from bulge loop 131 is connect with piston 15, the connection side of connecting rod 14 and piston 15 Formula is threaded connection or integral structure, and the shape of the piston is cylindric；Piston 15 is embedded in guide pipe 12, the work Plug 15 is axial in the presence of the gap that fluid can be allowed to pass through with guide pipe 12, forms the damp channel of Helmholz resonance chamber；Shell 11, the cavity of Helmholz resonance chamber is collectively formed in guide pipe 12, sealing plate 13, connecting rod 14 and piston 15.Pass through Mechanical Driven Insert depth of the device drive link 14 with piston 15 in guide pipe 12 adjusts the resonance frequency of gas attenuating device Rate changes its resonant frequency as fluid machinery operating condition changes, to guarantee the resonance of gas attenuating device Frequency and the air motion frequency that fluid machinery generates are always consistent, generate resonance, reach decaying gas amplitude and subtract Small vibration reduces the purpose of aerodynamic noise.

On the basis of the above, sealing ring 16 is additionally provided between the connecting rod 14 and bulge loop 131.By the way that sealing ring 16 is arranged Further improve the sealing of gas attenuating device.

Embodiment two

As shown in Fig. 2, the present embodiment two and the difference of embodiment one are: the both ends of piston 15 are provided with circular cone ring 151.

By the principle of Helmholz resonance chamber it is found that the sectional area of damp channel is to Helmholz resonance chamber intrinsic frequency Contribution degree is bigger, therefore in order to widen the frequency-tuning range of gas attenuating device, can be at the both ends of cylindric piston Circular cone ring 151 is set, changes the phase of circular cone ring 151 with damp channel by adjusting the depth of the insertion guide pipe 12 of piston 15 To position, the change rate of damp channel sectional area is adjusted, the intrinsic frequency range of gas attenuating device is further widened.

Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap Containing being within the protection scope of the utility model.

Claims (6)

1. a kind of adjustable gas attenuating device of frequency, it is characterised in that: including shell (11), guide pipe (12), close Sealing plate (13), piston (15) and connecting rod (14)；One end of the shell (11) connects guide pipe (12), and the shell (11) is separate One end of guide pipe (12) connects sealing plate (13), is provided with bulge loop (131) on the sealing plate (13), the connecting rod (14) with Bulge loop (131) is threadedly coupled, and the connecting rod (14) connect far from the one end of bulge loop (131) with piston (15), the piston (15) It is embedded in guide pipe (12), the piston (15) and guide pipe (12) are axial in the presence of the gap that fluid can be allowed to pass through, described Cavity is collectively formed in shell (11), guide pipe (12), sealing plate (13), connecting rod (14) and piston (15).

2. a kind of adjustable gas attenuating device of frequency as described in claim 1, it is characterised in that: the connecting rod (14) under the action of the external mechanicals driving device such as stepper motor or spanner, it can move axially, lead in guide pipe (12) The position in piston (15) insertion guide pipe (12) is overregulated, the resonant frequency of gas attenuating device is changed.

3. a kind of adjustable gas attenuating device of frequency as described in claim 1, it is characterised in that: the connecting rod (14) it is additionally provided between bulge loop (131) sealing ring (16).

4. a kind of adjustable gas attenuating device of frequency as described in claim 1, it is characterised in that: the connecting rod It (14) is to be threadedly coupled or integral structure with the connection type of piston (15).

5. a kind of adjustable gas attenuating device of frequency as described in claim 1, it is characterised in that: the guide pipe It (12) is to be threadedly coupled or weld with the connection type of shell (11).

6. a kind of adjustable gas attenuating device of frequency as described in claim 1, it is characterised in that: the sealing plate It (13) is to be threadedly coupled or weld with the connection type of shell (11).